InvoiceGuard Pro 1.1 — Invoice, PO & Receipt Review | n8n

InvoiceGuard Pro 1.1 compares structured invoices with purchase orders and accepted receipts. Deterministic rules check supplier, currency, SKU, unit, exact price, historical consumption, ordered/received quantities and arithmetic totals. Duplicate alerts cover the batch and supplied history. Every result requires human review; no payments are approved or executed. Delivered: primary n8n JSON with a six-invoice fictional demo, 113 regression checks (including 1,500 generated scenarios), HTML/CSV/JSON reports and a downloadable companion ZIP. The ZIP includes a regression workflow, an authenticated API template, fictional inputs, editable source and a buyer guide. Download it from the final node. Version 1.1 improves invalid date and empty receipt validation, rejects invisible identifier characters, adds review priorities and remaining quantities, separates currency totals and labels demo versus buyer data. A synthetic boundary batch of 500 invoices, 5,000 receipts and 10,000 combined lines passed. This is not a performance SLA. Requires your own n8n and JSON mapping skills. No AI API or community nodes. The optional API stays inactive and requires buyer-owned Header Auth; public authentication and ERP connections are not deployed or tested. Scope: whole units, supported two-decimal currencies, one PO per invoice, exact prices, up to 10,000 combined lines and 2,000,000 JSON characters. No OCR, ERP connectors, persistent ledger, cross-request locks or tax advice. Complete history and serial processing or external transactions are required. WORKFLOW FILES ONLY: one-time purchase. No installation, configuration, adaptation, hosting, monitoring, ongoing support, maintenance or promised updates. Buyer operates the workflow and pays provider costs. Mandatory statutory rights and marketplace conditions remain applicable. No financial outcome is guaranteed.